SELECT 
  name 
FROM 
  cscart_seo_names 
WHERE 
  object_id = 0 
  AND type = 's' 
  AND dispatch = 'eitems_chat.messages'

Query time 0.00070

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_seo_names",
      "access_type": "ref",
      "possible_keys": ["PRIMARY", "dispatch"],
      "key": "dispatch",
      "key_length": "194",
      "used_key_parts": ["dispatch"],
      "ref": ["const"],
      "rows": 1,
      "filtered": 100,
      "index_condition": "cscart_seo_names.dispatch = 'eitems_chat.messages'",
      "attached_condition": "cscart_seo_names.object_id = 0 and cscart_seo_names.`type` = 's'"
    }
  }
}